While Polyolefin and PVC heat shrink are great general-purpose materials, when extreme chemical resistance, and high use temperatures are needed, fluoropolymer heat shrink tubing is a great solution. Our fluoroplastic heat shrink tubing products are military spec and UL approved for various high temperature applications, and extremely chemical resistant. They meet or exceed both military (AMS-DTL-23053) and commercial standards. They also provide very low coefficients of friction (i.e. lubricity) for friction free sliding (e.g. FEP roll covers).
Fluoropolymers also absorb very little moisture, providing high dimensional stability, and they have very high LOI’s for use in plenum environments. Three materials are readily available for heat shrink tubing: PTFE (PolyTetraFluoroEthylene, Teflon), FEP (Fluorinated Ethylene Propylene) and PVDF (Polyvinylidene Fluoride, Kynar®).
Chlorinated and fluorinated elastomers are soft,
rubber-like materials that perform very well, even at very low
temperatures. Three such materials are: Neoprene®,
and our Diesel
resistant chlorinated polyolefin heat shrink tubing.
PTFE heat shrink tubing has a very high continuous use temperature (260°C), and outstanding chemical resistance. It is available in 2:1 and 4:1 shrink ratios, and meets or exceed the most stringent commercial (UL VW-1, UL 910, NFPA262) and military standards (AMS-DTL-23053/12).
While it is the best of the entire fluoropolymer heat shrink tubing family, PTFE is also the most difficult to shrink due to its extremely high shrinking temperature (325-340°C). A heat gun or a welding torch can be used, but it is not recommended due to the tendency for the material to have localized over-heating or under-heating. It is extremely important when shrinking PTFE that the material is uniformly heated to provide even shrinking. We recommend you use a controlled temperature oven; although this is obviously impractical for large harnesses or areas adjacent to temperature sensitive components.
Fluorinated Ethylene-Propylene (FEP) heat shrink tubing is a widely used, lower cost alternative to PTFE (Teflon). FEP is sometimes called Teflon (even though that is the wrong name for it). FEP has similar dielectric and frictional properties to PTFE. Although PTFE has superior chemical resistance to FEP, FEP can be used in most applications suited for PTFE. The major difference between the two materials is the continuous use temperature. FEP heat shrinkable tubing is suitable for continuous use at temperatures up to 204°C. FEP heat shrink conforms to Mil-I-23053/11, and UL 94 (V0, VW-1).
Another advantage FEP has over PTFE is its much lower shrink temperature. While PTFE needs a temperature of over 300C to shrink it, FEP heat shrink can shrink as low as 190°C. This can be a significant advantage when used in conjunction with temperature sensitive components.
PolyVinylidene Fluoride (PVDF) is a chemical compound used in high temperature applications. It also has outstanding chemical resistance and superior cut-through resistance to almost all heat shrink materials. Maximum continuous operating temperatures can ranged from 150-175°C
PVDF Heat shrink tubing is available in two types: flexible PVDF (150°C), and a semi-rigid material sold under the tradename Kynar (175°C). We carry both types, which conform to either AMS-DTL-23053/18 Class 2 (flexible PVDF) or AMS-DTL-23053/8 (Kynar)
Neoprene is known for its good fluid and solvent resistance, abrasion resistance, and outstanding low temperature flexibility. Neoprene heat shrink tubing is used for insulation, strain relief and abrasion protection on cable harnesses and wire bundles in the military and aerospace industries.
Neoprene has an operating temperature range of -75°C to 120°C, and meets the requirements of SAE AMS-DTL-23053/1 (formerly known as MIL-I-23053 or MIL-DTL-23053, or M23053/1).
Our Diesel resistant heat shrink tubing is highly resistant to avaiation and diesel fuels, hydraulic fluids and lubrication oils. This makes it suitable for protecting military ground cables and harnesses from both these fluids, and abrasion. It reliably protects terminals, connectors, and other components from most industrial fuels and mechanical damage.
DR has an operating temperature range of -70°C to 150°C, and meets the requirements of SAE AMS-DTL-23053/16 (formerly known as MIL-I-23053 or MIL-DTL-23053, or M23053/16).
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General Purpose and Adhesive Lined Heat Shrink Tubing
High Temperature and Chemical Resistant Heat Shrink Tubing
Ultra Thin Wall and Low Shrink Temperature (80°C)Heat Shrink Tubing